"We wanted the environment to be that way so people could come and have a good time and stand up and feel like they're in the show with me," Spears told GMA. "I love Vegas. The energy here is really, really good."

Spears' two-year stint begins Dec. 27 and will include 50 shows, but she told GMA she's not yet sure if she'll move there full-time.

Fans who go to Vegas to check out her show may also get a glimpse of her son Preston, whom Spears said "will probably be on stage."

Spears, who's been criticized for racy performances of her own throughout her career, also weighed in on another former child star embroiled in a similar controversy: Miley Cyrus.

"I think any time you do a performance that is memorable, you're going to have criticism," Spears said of Cyrus' performance with Robin Thicke at the MTV Video Music Awards. "I think she's doing her thing, being herself. So I give props to her."